Car-truck.



PATENTED MAY 12, 1903.

E. .W. SUMMERS.

GAR TRUCK.

APPLIUATION FILED NOV. 29, 1902.

2 SHEETS-SHEET 1.

N0 MODEL WITNESSES No. 728,043. v PATENTED MAY 12,1903.

' E. W. SUMMERS.

1 CAR TRUCK.

APPLICATION FILED NOV. 29, 1902. no MODEL.- 2 SHEBTS-BHEET 2.

WITNESSES INVENTOR INITED V STATES Patented May 12, 1963.

PATENT OFFICE.

CAR-TRUCK.

SPECIFICATION forming part of Letters Patent N 0. 728,043, dated May 12, 19 03." Application filed November 29, 1902. Serial No. 123,269. (No model.)

To all whom it may concern;

Be it known that I, EDGAR W. SUMMERS, of

panying drawings, forming part of this speci-- fication, in whichr Figure 1 is a side elevation, partly broken away, of my improved truck. Fig. 2 is a partial cross-section on the line II II of Fig. 1, and Fig. 3 is apartial top plan View. 7 Fig. 4 is a modified construction of bearing for segmental roller. r j I p My invention relates tothe class of trucks for railway-cars, and is designed to provide a light and strong construction which may be cheaply made, and, further, to combine with a truck an improved construction of roller side bearing which will allow a large diameter of roller and at the same time bring the center plate near the top of the truck.

In the drawings I show thetruck side frame as having an upper compression member 2, a depending tension member 3, and a lower connecting member 4. The compression member 2 consists of a shape which is preferably pressed, it having depending side flanges 5 5 and being preferably curved downwardlyslightly from the ends toward the center. The

ends of this compression member inclose capplates 6, to which the web of the compression member issecured by rivets 7. These capplates are preferably formed of cast-steel, and each is provided on the outer side with pro.- jecting perforated lugs 8 8 and upon the other side with an angle-socket 9 and a depending flange 10. The tension member consists of a bent bar or rod, and its ends are screwthreaded and engage screw-threads within the sockets 9 of the cap-plates. The inner pedestal 11 of each bearing is riveted to the flange of a socket, and the outer pedestal 12 is slipped between the lugs 8 and secured by a through-bolt 13. Each of these pedestals is shown as formed of a pressed flanged shape, with lower lips or flanges 14, which are fastened to the web of the connecting member 4, the outer one by a removable bolt.

At the center of the side frame I provide side plates 15, having inwardly-bent upper flanges l6 and similar lower flanges 17, which are riveted,respectively,to the web of the compression member and to the web of theconnecting member 4. The lower flanges 17 of these plates are 'provided'with inner turnedup flanges or extensions 18, between which thetension member3extends. Theseflanges or extensions thus serve to hold the tension member in place at this point. I A cylind'rical pin 19 is-removably secured between the side plates by a central bolt 20 extending through them, this pin resting within the central bent or curved portion of. the tension- ;rod 3, and upon this pin is mounted a side bearing consisting of a segmental roller 21. This segmental roller is preferably formed of cast-iron, with a curved upper bearing-face, which is preferably chilled and is struckfrom the center of the pin 19 as a radius. By forming thebearing for the segmental roller of a pin of relatively small diameter the frictional resistance is greatly reduced, as the surfaces .which are; in frictional contact are near the center of motion andthe power is applied at a :pointfremote therefrom and greatlyincreases the leverage exerted to overcome the frictional'resistance between the segment and the pin 19, upon which it bears.

through a central longitudinal slot in a coverplate 22,and the web of the compression member 2 is also providedwith a slot having (is-- pending inner flanges 23, which act as guides for the roller. I preferably form this segmental roller with an inner cavity 24:, having side hole 25 and a small hole 26 at the bottom, leading to the surface of thepin 19. Waste 27 may be placed in the cavity, into which oil is poured, this oil seeping down between the roller and the pin to lubricate their coacting faces. 4 r

The top member 28 of the transom preferablyconsistsof-a pressed shape havingdepending side flanges 29, which at the ends are spread out in the plane of the web,'as shown in Fig. 3. The cover-plate 22 ispreferably anintegral part of this member, these ends being slotted to receive the segmental roller, I as above described, and are secured to the compression member of the side frame by The upper portion of 7 this segmental-roller projects rivets 30, which also pass through the covers -tion of the truck.

as to be clear of the track in case of derailment. The ends of these flanges are spread out in the plane of the web, and these ends are secured to the connecting member 4: of the side frame by rivets,which extend through these parts and through the lower flanges 17 of the side plates. are diagonal flanged brace members which extend from the outer part of thelower transom member 31 inwardly and upwardly to points adjacent to a central flanged hole 34 in the Web of the member 28, where they are riveted. This hole 34 receives the center plate 35 on the car-bolster, the weight, however, being taken. only on the side bearings.

To limit the swing of the segmental roller at both ends of its travel, I preferably provide flanges 36 at the ends of the slot in the member 2, which act as stops. The shoes 37 upon the car-bolster rest upon the segmental rollers.

If the segmental rollers should rest against the slot 36 when the car-body is off of the truck, the stop 36 will adjust it to a central position.

The segmental roller 21 may be centered by a spring, but is preferably made as shown. The stops 36 slide the roller on the bearing 37. Then the cargoes around the first curve, it meets in a direction which will push the roller from the position shown in dotted lines, and after the segmental roller is moved by the stop and is out of contact with it the contact is then a rolling and not a sliding one with the shoes 37. The segmental roller 21 may be formed with a rounded lower end 21, arranged to fit a corresponding socket in a bearings-block held by the tension member 19', as shown in Fig. 4. i It will be noted that the lines drawn through the centers of gravity of the tension member and compression member of the side frame intersect in a vertical plane drawn through the axis of the journal. This important feature is claimed, broadly, in my copending application, Serial No. 107,080, filed May 13, 1902, and is only claimed specifically herein.

The advantages of lny construction result from the simple, light, and strong construc- The load is applied at the center, the segmental roller acting as a central column of the truss, the strains being applied directly to the tension member and distributed through such member to the compression member. There are no small parts, and the threaded socket gives the best form of connection for the tension member. The rocker or segmental roller while large in diameter brings the center plate near the top of the truck, thus lowering the carframe. The removable bolt for the pin 19 takes the vertical component of the compressve strain in the top compression member.

The loads are centered directly upon the side frames, and the transom may be made of light construction. 1

Many changes may be made in the form and arrangement of the truck and its parts, as well as the side bearing, without departing from my invention.

I claim- 1. A car-truck side frame having pedestal cap-plates, a tension member having screwthreaded engagement with said cap-plates, and a top compression member secured to the cap-plates; substantially as described.

2. A car-truck side frame having metal cap-plates provided with screw-threaded sockets, pedestals secured to flanges on the capplates, a tension member whose ends engage the screw-threaded sockets, and a top compression member secured to the cap-plates; substantially as described.

3. A car-truck side frame having a compression member, a cap-plate located over the journal and to which said member is socured, and a tension member secured to the cap-plate, the lines through the center of gravity of the compression and tension members intersecting substantially in a vertical plane through the journal; substantially as described.

4. A car-truck side frame having an oscillating support centered at the base of the side frame; substantially as described.

5. A car-truck side frame having a downwardly-bent tension member and an oscillating side-bearing support centered at the base of the side frame within the angle of the tension member; substantiallyas described.

6. A car-truck side frame having an upper compression member, a bent tension member with a central portion at the base of the frame, a pin supported upon the central bent portion of the tension member, and a rocker resting on said pin; substantially as described.

7. A car-truck side frame having a tension member, and a rocker for a side bearing supported upon said tension member; substantially as described.

8. A side frame having a segmental rocker resting upon a pin near the middle base of the frame, and projecting upwardly through the top compression member; substantially as described.

9. A car-truck having a top compression member, a downwardly-bent tension member, and an oscillating rocker forming the central column of the truss; substantially as described.

10. A side frame having a roller side bearing consisting of an oscillating rocker supported upon a pin, said rocker having an oiling-cavity; substantially as described.

11. A car-truck having a top compression member, a bent tension member, and a lower connecting member, central side plates, a pin supported upon the tension member and held between the side plates, and a rocker supported on the pin and extending upwardly through the compression member; substantially as described.

12. A car-truck having a downwardly-bent tension member, side plates inclosing the central part of said member, a rocker supported upon the central part of the tension member, and guides to prevent sidewise displacement of said tension member; substantially as described.

13. A car-truck side frame havinga tension member, and a rocker, a bearing for said rocker whose radius is smaller than the radius of said rocker; substantially as described.

14. A car-truck side frame having a tension member, and a rocker, a bearing at its lower end for said rocker-support whose radius is smaller than the radius of said rocker; substantially as described.

15. A car-truck side frame having pedestal cap-plates, a tension member secured to said capplates, and a top compression member in contact with and directly secured to the capplates; substantially as described.

16. A car-truck side frame having metal cap-plates provided with sockets, pedestals secured to flanges on the cap-plates, a tension member whose ends engage the sockets, and

a top compression member secured to the cap my hand.

EDGAR W. SUMMERS. Witnesses:

GEO. B. BLEMING, LENDELL A. OoNNER, J r. 

